Malicious PDF — malware analysis report

Static analysis result for SHA-256 980b7f7121168195…

MALICIOUS

PDF

37.1 KB Created: 2020-10-17 10:44:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 43291141713d8a3dfc2d1e33b4ff2961 SHA-1: 31794dcf7fc14f73230e4785c2fcc444b2189898 SHA-256: 980b7f712116819575ee2260c8372b1b5517a5e3f7260d513de599931f209354
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://cctraff.ru/123?keyword=aci+reinforced+concrete+design+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369519/normal_5f899ed276170.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365619/normal_5f87086c4e88b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366020/normal_5f86f647a422d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369769/normal_5f88be1376a76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366032/normal_5f873dceb3138.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368958/normal_5f89a035bc191.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366976/normal_5f8a9a29c0246.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365638/normal_5f87036e310d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5f870988e204b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372719/normal_5f88c84a9c0a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374364/normal_5f89c1408aee0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365646/normal_5f8780f625990.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366048/normal_5f87516983ecc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f86223b8-8874-4e3e-9f98-dcfef7c2ead9/tinumubutisodo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0edcb1c5-a7fa-4dc5-8196-fd551cbe61d3/75330662956.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6343ea8e-a36a-4230-9131-fc107ac8a56c/pavasupelu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8e652d3-7ff4-4482-ae56-94a309ea7d3a/23624151338.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4dc2fee-1eba-477f-baa3-43197e8ee289/zubeidaa_songs_320kbps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33de446f-806f-49e1-b323-15ddffe560bc/zedirogatizimozuriti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d01119a5-42a6-44c7-93d3-814821379bd4/noraxuzezo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8f526a0-a3b8-46c3-9d07-1313b2a3a89d/bebopajetanaminitojiluw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d20c8fd6-a371-43d0-86bd-65a280900067/77809870112.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8af52dc-23ee-4f14-b56b-5e60670688ac/18131308940.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e33fd65-360f-41cc-9e95-931daedc5ff0/wuvokadoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0546781f-7680-4824-9a55-496fb0f75ac9/58116702854.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52DF 5328 bytes
SHA-256: 096b6f62b4215887acae398c7d5ebfab3003daf773a737b1f0e8eb7a44f98176
font_01_sfnt_off000064de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64DE 9872 bytes
SHA-256: 564113b45fef0811db24f7b50fedb548b20d60e0f3d874a80fef838c81ceefb5

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